Volume LXXIII, No. 5. Published by Conde Nast Publications, Inc., 420 Lexington Ave., New York. Editor, John W. Campbell; asistant editor, Kay Tarrant; art director, Herbert S. Stoltz; business manager, Robert E. Park; advertising director, Harry F. Decker, advertising manager, Walter J. McBride; cover artist, Kelly Freas; illustrators, Kelly Freas and John Schoenherr..

Volume LXXIII, No. 5. Published by Conde Nast Publications, Inc., 420 Lexington Ave., New York. Editor, John W. Campbell; asistant editor, Kay Tarrant; art director, Herbert S. Stoltz; business manager, Robert E. Park; advertising director, Harry F. Decker, advertising manager, Walter J. McBride; cover artist, Kelly Freas; illustrators, Kelly Freas and John Schoenherr..

Science fact article.

Serial: part 1 of 3 parts. Illustrated by Kelly Freas. Published as a novel in 1965 under the same title.

Novelette. Illustrated by John Schoenherr. Nicholas Van Rijn series. Appeared in the collected works [i]Trader to the Stars[/i], published in 1964; [i]Going for Infinity[/i], published in 2002; and [i]David Falkayn: Star Trader[/i], published in 2009. Appeared in the anthology [i]Robert Silverberg Presents the Great SF Stories: 1964[/i], edited by Robert Silverberg and Martin H. Greenberg, published in 2002.

Short story. Illustrated by John Schoenherr.

Short story. Illustrated by John Schoenherr. Appeared in the anthologies [i]Analog 4[/i], edited by John W. Campbell, published in 1966; and [i]The Permanent Implosion[/i], edited by John W. Campbell, published in 1970.